I couldn't find if this had been asked before so I was just wondering if my fit has never had the trans fluid changed for this long is it worth doing it now? I've heard that if you wait to long it could start slipping after a fluid drain and fill.
Not talking about a flush just drain, fill, drive repeat 3x.

 

Slipping? It's an automatic?

 

Changing the auto trans fluid in and of itself will not start the trans slipping. The mileage on your car is still pretty low for a gen two car and will benefit from the fluid change(s) Since you can't get all the fluid out when draining it, a lot of owners in your situation will drain the fluid a total of three times, driving maybe 50-100 miles in between the changes. Doing the multiple fluid changes will help dilute the old trans fluid you can't get in a simple drain- like the fluid in the torque converter and cooling lines. While you're at it you might consider replacing the external trans fluid filter located above the trans near the shift solenoids, and under the car's battery. I believe that filter doesn't come up on regular maintenance schedules but is fairly easy to access and replace.

 

Automatics can indeed "slip"!
I've done it loads of times! Improper fluid level in a cvt, too many detergents/friction modifiers in an automatic. It does happen. but folks haven't been talking about it here, unless they had a leak. You might regard it as a lull and a surge. Press the gas, doesn't go, then BAM. Goes, flinging you into traffic.

I don't think Honda's fluid causes this, as I haven't heard it reported. Dealt with it with Toyota's "world standard". the parts counter dude actually whispered to me that it was the fluid, which I believed because I nailed levels within the required temp range for the taco prerunner I was servicing. Made me look like such an ass, to my pop no less. I swapped the fluid to redline d6 (vehicle appropriate) and the fault was gone. After that, he never let me touch it

Fuckin free labor...

Don't use shit fluid. Honda, or a reputable brand appropriate for your vic. You'll be fine, and your trans will be happy!
I've got a manual and can tell when the fluid is fresh It's all buttery smooth

 

Just do the NOOB method, it gets almost all the old fluid out, uses less transmission fluid than the multiple changes method, and it only takes a few minutes longer than one simple change.

https://www.fitfreak.net/forums/2nd-...ill-flush.html

 

It is absolutely worth doing a 3 time drain & refill to "flush out" the old ATF. In fact, there are a few service bulletins out there pertaining to ATF DW1 filled cars dealing with a judder like symptom due to degraded ATF when accelerating with the torque converter either clutch fully or partially locked. These vehicles tend to be V6 powered vehicles with 5AT or 6AT transmissions such as the Pilot, Odyssey, Ridgeline and Accord but even the CR-V is known to circum to this judder. From first hand experience (in client vehicles), this usually tend to happen when either the service life of the ATF exceeds 3 years/45k miles or when the fluid has been OR when the ATF is overheated/degraded with frequent/extended towing.

If you're doing simple, civil commuting like most Fit owners then you'll be plenty fine with Honda's ATF DW1. If you're dealing with more frequent, sustained grades, doing some towing with smaller trailers and/or doing semi-regulator spirited drives then I'd recommend a fluid such as AmSoil's Signature Series Multi-Vehicle ATF or one of Redline's two ATF options. The reason for the AmSoil suggestion is that it has a MUCH better heat tolerance than Honda's ATF DW1 and ATF Z1 (which has a higher heat tolerance than DW1 but is discontinued, shorter service life & poorer shift quality) and identical/if not smoother shift quality than DW1.

I've been running that ATF in my supercharged 2008 Fit for the last 5 or so years with frequent autocross during that time and haven't had any issues even without an additional ATF cooler on the factory sealed transmission.